5 mm bore size for 3420 cc displacement

you can fine-tune your M44 engine to match your driving goals—whether for spirited street driving

or piston pin

The DOC Race turbo kit is the ultimate turbo kit for your street machine

This set includes bolts and lubricant

M54 Throttle Cable Conversion Kit S65 Springs 5 mm bore size forThe Throttle Cable Conversion Kit is engineered to convert your OEM drive by wire throttle body into a cable controlled system. Designed for BMW M54 engines, this kit replaces the factory electronic throttle actuator, delivering a more responsive and direct throttle feelperfect for high performance builds that demand precision. By eliminating the electronic throttle actuator, this conversion restores direct control between the throttle pedal and